Abstract: Quantitative relationship between length(L)and maximun displacement(D)of strike-slip surface rupture zone, earthquake magnitude(M_s) and recurrence interval(T) for earthquakes in west China is empirically fitted. The result indicates that the earthquake magnitude M_s and recurrence interval T are closely associated with both rupture length L and maximum displacment D.M_s can be estimated from multiplication product LD, and T is closely related to the ratio D/L. Given M_s or LD for an earthuqake,the larger the D/L valus is,the longer the recurrence interval T becomes. Given surface rupture length L for an earthquake with longer recurrence interval T, its M_s or LD is larger. Given maximum displacement D for an earthquake with larger M_s or LD, its recurrence interval is shorter.

Key words: Surface rupture length, Maximum displacement, Magnitude M_s, Earthquake recurrence interval

摘要： 研究了我国西部走滑型地震的地表破裂长度L和位移量D与震级M_s和复发时间间隔T之间的定量关系。结果表明：震级M_s和复发间隔T不仅与L值有关,还同时与D值相关；乘积LD值可用来估算震级M_s,比值D/L与复发间隔T密切相关；对于M_s或LD值给定的地震,D/L值大(即L值小或D值大)的地震,有较长的复发间隔；当破裂长度L一定时,有较长复发间隔的地震,M_s或LD值较大；当位移量D相同时,M_s或LD值较大地震的复发间隔较短。

关键词: 破裂长度, 断层位移, 震级, 地震复发间隔